Mold for tongue-and-groove concrete blocks.



APPLICATION FILED APR. 12. 1913.

Patented 14, 1915.

2 SH TS-SHEE1 1.

way

J. J. HOSTETLER & W. 0. RICE.

MOLD FOR TONGUE AND GROOVE CONCRETE BLOCKS.

APPLICATION FILED APR. 12. $913.

1,153,84fi, Patented 14,

28H TSSHEE JOHN J. HOSTETLER AND WILLIAM OLIVER RICE, OF CLARKTON, MISSOURI; SAID HOSTETLER ASSIGNOR .IO SAID RICE.

Specification of Letters Patent.

Patented Sept. 14, 1915.

Application filed April 12, 1913. Seria1 No. 760,839.

To all 10. 10171 it may concern Be it known that we, JOHN J. HOSTETLER and WILLIAM OLIVER RICE, citizens of the United States, residing at Clarkton, in the county of Dunklin and State of Missouri, have invented a Mold for Tongue-and- Groove Concrete Blocks, of which the following is a specification.

The invention relates to molds, and more particularly to the class of block molds.

The primary objectof the invention is the provision of a mold wherein the block when formed thereby will present grooves and tongues so that on the building of a wall or the like adjacent blocks will be fitted together without requiring the use of mortar or cement to afford a unitary structure.

Another object of the invention is the provision of a mold wherein building-blocks can be formed to enable the interlocking of the same when constructing a wall so that air can come in contact with all surfaces of the blocks as the same will be interlocked with each other without the use of mortar, so as to assure dryness and thereby obvi-- ating the decay or otherwise deterioration in the wall or the like.

A further object of the invention is the provision of a mold wherein building blocks can be formed'in a convenient manner and at a minimum expense.

A still further object of the invention is the provision of a mold which is extremely simple in construction and inexpensive in manufacture.

\Vith these and other objects in view, the invention consists in the construction, combination and arrangement of parts which will be hereinafter fully described, illustrated in the accompanying drawings, and

pointed out in the claim hereunto appended.

In the drawings: Figure 1 is a perspective view of a mold constructed in accordance with the invention, showing one end removed. Fig. 2 is a vertical transverse sectional view through the mold showing a block in section therein. Fig. 3 is a perspective view of one side wall of the mold. Fig. 4 is a perspective view of the other side wall of the mold. Fig. 5 is a perspective view of the bottom of the mold. Fig. 6 is a perspective view of the other end wall of the mold. Fig. 7 is a view similar to Fig. 1, showing the end mounted therein. Fig. 8 is a horizontal. sectional view through the mold. Fig. 9 is a modified form of one side of'the mold. Fig. 10 is a modified form of the other side of the mold. Fig. 11 is a perspective view of one end of the mold. Fig. 12 is a perspective view of the top of the mold. Fig/13 is a modified form of the other end of the mold.

Similar reference characters indicate corresponding parts throughout the several views in the drawings.

Referring to the drawings in detail, the mold comprises substantially rectangular shaped top and bottom sections 10 and 11, the latter being formed with a rib 12 on its inner face which is disposed transversely thereof and spaced from one end of the same, the said rib being of a length to terminate a distance removed from the longer edges of the bottom and is adapted to provide a groove in the material when molded into block form. Engaged between the top and bottom 10 and 11 and held in any suitable manner are side walls 13 and 14 respectively, the latter being formed in its inner face with longitudinally disposed grooves 15 and 16, the-latter having one end opening through one end of the wall 13 while its opposite closed end is separated from the groove 15 through the medium of a separating web 17 and these grooves 15 and 16 respectively are adapted to receive the material of the mass to be shaped into block form so as to provide ribs on one face thereof. The other side wall 13 has formed on its inner face a raised reversely beveled slab portion 18 from which projects a substantially T-shaped rib 19 and a lug 20 which is spaced from the longer stretch of the T-shaped rib 19 to form a gap 21 therebetween, the longer stretch of the T-shaped rib l9being disposed longitudinally of the slabs 18, and this rib 19 together with the lug 20 serve to form correspondingly shaped indentations in one face of the block when molded, while the gap 21 forms a protuberance on the said face of the block. In one end of the wall 13 is formed a notch 22 which together with the groove 16 in the other wall 14 serves to receive the end projections 23 which are the continuations of a rib 24 formed on and projected from the in ner face of an end wall 25, the inner face of this wall being reversely beveled as at 26 on opposite sides of the rib 24, the bevel being such as to correspond with the bevel of the slab 18 so that one end face and one side face of the block when molded will contain correspondingly shaped concavities, as is illustrated in Fig. 2 of the drawings. The other end wall 27 is devoid of ribs or channels so that both faces are fiat, and it is adapted to close the opposite end of the mold on contacting with the end edges of the top, bottom and side walls thereof.

By the use of the mold as constructed as hereinbefore described the finished block molded thereby will contain channels and also will be formed with ribs or tongues so that when a number of these blocks are used they can be interlocked with each other without requiring the use of mortar.

In Figs. 8, 9, 10 and 12 there are shown modified forms of the walls of the mold. With reference to Fig. 9, the side wall 28 is formed on its inner face with a raised slab 29 provided with reversely beveled portions 30, the same being identical with the slab 18 on the side 13, and protruding from this slab 29 are spaced projections 31 so that when the side 28 is used in the mold the finished block will have alternately arranged projections and indentations. In Fig. 10 the other side wall 32 which discloses a modified form contains spaced alining intermediate and outer channels or grooves 33 and 34 respectively, the latter opening through opposite ends of the said Wall, and on the molding of the block the material thereofenters the grooves 33 so that on the finished article ribs will protrude from one face thereof. In Fig. 12 there is shown a modified form of end wall 35 which is sub stituted for the end wall 27 when desired, and this wall. contains on its inner face a channel 36 which has its closed end spaced from one end of the said wall, while the opposite open end .37 .extends through the other end of the wall. Projected from the end of the wall 35 through which the channel 36 opens is a tongue 38 which is adapted to enter one of the grooves 34:. in the side wall 32 so that one of the channels 34 and the channel 36 will communicate with each other to enable the formation of a rib on the block which extends about one corner thereof so that a block finished with this rib is used as a corner block in the building of a wall so that the corner block will interlock with those blocks used in the building of straight walls.

From the foregoing it is thought that the construction and manner of use of the device will be clearly understood, and therefore a more extended explanation has been omitted.

What is claimed is .A mold box consisting of a flat bottom, a fiat top, a plate forming one end of said box, two sides disposed with: edges in contact with said bottom, top and end plate, one of said sides being formed with configus rating tenons intermediate its ends, the other side being formed with grooves, an end plate consisting of a block having oppositely beveled faces upon one side terminating short of a median line, a tongue having a longitudinally straight edge'flush with the outer sideof said block,.and having another lon- Y gitudinal edge spaced throughout from said block and having its ends spaced from the opposite ends. of said block whereby to prov'ide an elongated tenon laterally of said block, said first named side being formed with a recess, outwardly inclined surfaces formed upon said first named side and terminating in a plane with said recess, and extending in advance of the inner edge ofthe recess, atongue formed on said last named side in advance of said inclined surface and having one side flush with the inner edge of said recess, said other side being formed with a recess, said block having its tenon' snugly received at its ends into said recesses and having its longitudinal spaced edge disposed Within the box and bearing against the inner edges of said recesses to constitute groove forming parts,

JOHN J. HOSTETLER.

Witnesses:

A. R. ZIMMERMAN, SAM G. SHARP,

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of gatents, Washington, G.

WILLIAM oLIvEn RICE. 

